CAS Number 1416881-51-0
4CzPN is one of three isomers (including 4CzTPN and 4CzIPN) which belong to the carbazolyl benzonitriles (CBC) family. CBC family members are well known, highly efficient thermally activated delayed fluorescence (TADF) materials.
The carbazolyl groups are located next and opposite to the nitrile groups, electrons in 4CzPN orbitals are supposedly more delocalized than its isomers. However, with four bulky carbazolyl groups next to each other, the steric hindrance can reduce the conjugation of the carbazolyl groups to the centre benzene ring.
| CAS Number | 1416881-51-0 |
| Full Name | 3,4,5,6-tetrakis(carbazol-9-yl)-1,2-dicyanobenzene |
| Synonyms | 1,2,3,4-tetrakis(carbazol-9-yl)-5,6-dicyanobenzene |
| Chemical Formula | C56H32N6 |
| Molecular Weight | 788.27 g/mol |
| Absorption | λmax 315, 325, 364 nm in toluene |
| Fluorescence | λem 528 nm in toluene |
| HOMO/LUMO | HOMO = 5.83 eV, LUMO = 3.38 eV; T1=2.50 eV [1] |
| Classification / Family | Carbazole, TADF materials, Green dopant materials, Sublimed materials |
Chemical Structure of 3,4,5,6-tetrakis(carbazol-9-yl)-1,2-dicyanobenzene (4CzPN), CAS 1416881-51-0
| Purity | Unsublimed >98.0% (HPLC), Sublimed >99% (HPLC) |
| Melting Point | >360 °C (lit.) |
| Appearance | Orange powder/crystals |
| Device Structure | ITO/MoO3 (8 nm)/TAPC (60 nm)/TCTA (5 nm)/FIrpic (0.5 nm)/SPA-TXO2* : 4CzPN(25 nm)/TPBi (60 nm)/LiF (0.5 nm)/Al (100 nm) [1] |
| Colour |
 Green
|
| Max. Current Efficiency | 43.5 cd/A |
| Max. EQE | 13.1% |
| Max. Power Efficiency | 42.6 Im/W |
| Device Structure | ITO/MoO3 (8 nm)/TAPC (60 nm)/TCTA (5 nm)/FIrpic (0.5 nm)/o-CzTHZ* : 4CzPN(25 nm)/TPBi (60 nm)/LiF (0.5 nm)/Al (100 nm) [1] |
| Colour |
Green
|
| Max. Current Efficiency | 61.1 cd/A |
| Max. EQE | 17.9% |
| Max. Power Efficiency | 50.5 Im/W |
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